<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
// +----------------------------------------------------------------------+
// | PHP version 4.0													  |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2003 The PHP Group								|
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license,	   |
// | that is bundled with this package in the file LICENSE, and is		|
// | available at through the world-wide-web at						   |
// | http://www.php.net/license/2_02.txt.								 |
// | If you did not receive a copy of the PHP license and are unable to   |
// | obtain it through the world-wide-web, please send a note to		  |
// | license@php.net so we can mail you a copy immediately.			   |
// +----------------------------------------------------------------------+
// | Author: Alexey Borzov <avb@php.net>								  |
// +----------------------------------------------------------------------+
//
// $Id: Compare.php,v 1.1 2006/09/24 17:04:56 jamiesensei Exp $

require_once 'HTML/QuickForm/Rule.php';

/**
 * Rule to compare two form fields
 * 
 * The most common usage for this is to ensure that the password 
 * confirmation field matches the password field
 * 
 * @access public
 * @package HTML_QuickForm
 * @version $Revision: 1.1 $
 */
class HTML_QuickForm_Rule_Compare extends HTML_QuickForm_Rule
{
   /**
	* Possible operators to use
	* @var array
	* @access private
	*/
	var $_operators = array(
		'eq'  => '==',
		'neq' => '!=',
		'gt'  => '>',
		'gte' => '>=',
		'lt'  => '<',
		'lte' => '<='
	);


   /**
	* Returns the operator to use for comparing the values
	* 
	* @access private
	* @param  string	 operator name
	* @return string	 operator to use for validation
	*/
	function _findOperator($name)
	{
		if (empty($name)) {
			return '==';
		} elseif (isset($this->_operators[$name])) {
			return $this->_operators[$name];
		} elseif (in_array($name, $this->_operators)) {
			return $name;
		} else {
			return '==';
		}
	}


	function validate($values, $operator = null)
	{
		$operator = $this->_findOperator($operator);
		if ('==' != $operator && '!=' != $operator) {
			$compareFn = create_function('$a, $b', 'return floatval($a) ' . $operator . ' floatval($b);');
		} else {
			$compareFn = create_function('$a, $b', 'return $a ' . $operator . ' $b;');
		}
		
		return $compareFn($values[0], $values[1]);
	}


	function getValidationScript($operator = null)
	{
		$operator = $this->_findOperator($operator);
		if ('==' != $operator && '!=' != $operator) {
			$check = "!(Number({jsVar}[0]) {$operator} Number({jsVar}[1]))";
		} else {
			$check = "!({jsVar}[0] {$operator} {jsVar}[1])";
		}
		return array('', "'' != {jsVar}[0] && {$check}");
	}
}
?>
